NonUniformTable1.H

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License
    This file is part of OpenFOAM.
 
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    the Free Software Foundation, either version 3 of the License, or
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    You should have received a copy of the GNU General Public License
    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
 
Class
    Foam::Function1s::NonUniformTable
 
Description
    Non-uniform tabulated property function that linearly interpolates between
    the values.
 
    To speed-up the search of the non-uniform table a uniform jump-table is
    created on construction which is used for fast indirect addressing into
    the table.
 
Usage
    \table
        Property    | Description
        values      | List of value pairs
    \endtable
 
    Example for the density of water between 280 and 350K
    \verbatim
    rho
    {
        type    nonUniformTable;
 
        values
        (
            (280 999.87)
            (300 995.1)
            (350 973.7)
        );
    }
    \endverbatim
 
\*---------------------------------------------------------------------------*/
 
#ifndef NonUniformTable1_H
#define NonUniformTable1_H
 
#include "Function1.H"
#include "Tuple2.H"
#include "TableReader.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
namespace Function1s
{
 
/*---------------------------------------------------------------------------*\
                       Class NonUniformTable Declaration
\*---------------------------------------------------------------------------*/
 
template<class Type>
class NonUniformTable
:
    public FieldFunction1<Type, NonUniformTable<Type>>
{
    // Private member data
 
        //- Lowest value in the NonUniformTable
        scalar low_;
 
        //- Highest value in the NonUniformTable
        scalar high_;
 
        //- Table values
        List<Tuple2<scalar, Type>> values_;
 
        //- Increment derived from low_, high_ and values_.size()
        scalar delta_;
 
        //- The jump table
        List<label> jumpTable_;
 
        //- Table reader
        autoPtr<TableReader<Type>> reader_;
 
 
protected:
 
        //- Return the lower index of the interval in the table
        //  corresponding to the given value
        inline label index(scalar x) const;
 
 
public:
 
    //- Runtime type information
    TypeName("nonUniformTable");
 
 
    // Constructors
 
        //- Construct from name and dictionary
        NonUniformTable
        (
            const word& name,
            const Function1s::unitConversions& units,
            const dictionary& dict
        );
 
        //- Copy constructor
        NonUniformTable(const NonUniformTable<Type>& nut);
 
 
    // Member Functions
 
        //- Return the non-uniform table of values
        const List<Tuple2<scalar, Type>>& values() const
        {
            return values_;
        }
 
        //- Evaluate the function and return the result
        virtual Type value(scalar x) const;
 
        //- Integrate between two scalar values
        virtual Type integral(const scalar x1, const scalar x2) const;
 
        //- Evaluate the derivative of the function and return the result
        Type dfdT(scalar T) const;
 
        //- Write the function coefficients
        void write(Ostream& os, const unitConversions& units) const;
 
 
    // Member Operators
 
        //- Assignment
        void operator=(const NonUniformTable<Type>&);
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Function1s
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#include "NonUniformTable1I.H"
 
#ifdef NoRepository
    #include "NonUniformTable1.C"
#endif
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //